Bellows



(No Model.)

0. KULLBOM.

BELLOWS.

No. 405,103. Patented Jun 11,1889.

WITNESSES: IIVI/E/VTOH.

ATTORNEY.

N. PETERS, Pbolmnm m mr. Wnhinglon. n a

UNITED STATES PATENT OFFICE.

OTTO KULLBOM, OF AVONDALE, ILLINOIS.

BELLOWS.

SPECIFICATION forming part of Letters Patent No. 405,103, dated June 11, 1889.

Application filed December 12, 1887. Serial No. 257,708. (No model.)

To all whom it'may concern:

Be it known that I, OTTO KULLBOM, a citizen of the United States, residing at Avondale, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bellows; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to certain improvements on the ordinary blacksmiths forge-bellows; and the present improvement has for its object to provide an improved safety appliance for attachment to an ordinary bellows, which affords a sure and certain means to prevent the reflux or backflow of the explosive gases of the forge-fire into the interior of the bellows, and thereby effectively prevent any danger of an explosion within the bellows, and the consequent injury to the same and to persons or property in proximity thereto. I attain such object by the construction and arrangement of parts illustrated in the accompanying drawings, i11*which Figure 1 is aside elevation, partly sectionized, of a square bellows to which my impro vements are applied; and Fig. 2 is a detail horizontal section at line 00 00, Fig. 1.

Similar letters of reference indicate like parts in both views.

In the drawings I have represented myimproved appliance attached to an ordinary square bellows, the folding sides of which are formed of wood boards A, united together and to the heads B by flexible leather or other joints 0, as shown, yet my improvement is equally applicable to any other well-known form of bellows.

D is the flexible air chamber or accumulator in which the compressed air is received through the usual valved opening in the fixed diaphragm or partition E, and from which it is delivered at a uniform pressure through the outlet 6. i

F is a rocking valve closing an opening in the top of the air-chamber D,and is provided with an operating-lever G, which extends over the side of the bellows and is connected by a flexible cord H to a fixed part of the bellows or frame, so that when the top of the airchamber has reached a predetermined height the cord will pull on the lever to open the valve and allow any further excess of pressure to escape.

The air from the air chamber, passing through the outlet 6, enters a valve-chamber I, secured to the under side of the partition E and provided with an inlet-chamber I, separated from the outlet-chamber J by a perforated partition K, the perforations or passages of which are controlled by a flexible leather valve L. The passages 10 are in two vertical series or rows, and between them the valve-leather L is secured by a vertical confining-strip L, so that the valve will open in a horizontal plane, as indicated in Fig. 2.

The outlet-chamber J is formed separate from the inlet-chamber I and secured thereto by bolts j, J being a screw-threaded or flanged outlet-neck for the attachment of the forge pipe or nozzle J The action of this valvular construction is to prevent a reflux or backfiow of the explosive gases from the fuel and the consequent danger of an explosion within the interior of the bellows.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

As an improved article of manufacture, a safety attachment for bellows,consisting of a valve-casing adapted to be attached beneath the fixed partition of the bellows and having a vertical inlet-chamber I, open at top, an inclined valve seat or partition K, valve L, and outlet-chamber J, having a horizontal outletpassage J, as described, and for the purpose set forth.

In testimony whereof witness my hand thi 10th day of December, 1887.

, OTTO KULLBOM.

In presence of- ROBERT BURNS, D. W. LosEY. 

